Device for ascertaining inaccuracies in stud wheels



Sept. 1, 1925. [551,671

DEVICE FOR ASCERTAINING INACCURACIES IN s'run WHEELS F. J. KAUFMANN 2 Sheets-Sheet 1 Filed Feb. 6, 1922 y 7:2 .{NVENTOR ATTORNEY Patented Sept; 1, 1925.

J. xnurnainmor TRIBES 1111., NEW roan.

nnvrcn ron-nsonnrernme inaccunaom's srun wnnnns;

, A t'ncation filed February s, 1922. Seria1 No.-- 53 4,480. 7

To cill 'iu hom it may f, i Beit known 'thatI, FRANK J. KAUFMANN,

a citizenof the United:States,"rand-:a' resi-i dent ofTribes Hill, 'in'thecounty of-Monti-l gomery and State of New York, have in- Vented a: certain new 'and useful Device for Ascertaining Inaccuracies'in Stud :Wheels,

ofwhich the following is a specification This I invention relates :to Warp knitting machines such as are disclosed in United States Letters PatentfNos/397,I40; 1,297,;

424 and 1,299,754 and has more particu larly reference to means for ascertaining "inaccuracies in the ncam orstud wheels that impart reciprocating Y motion 'to the guide bar. or bars. f

, c In machines of a this character, the guide bars ,have a reciprocating movement in one" plane :and an oscillating movement in; an other plane at right angles tothe first? one,

. the operation in generahfso far: as these elements are concerned, being that the guide bars partake of one stroke oftheir; recipro= eating. movement, ,then jrock 'through the spaces betweenthe' needles to ftheother side ofthe latter, thenfreceive the return-stroke Wheel, andya spring,

of their reciprocating motion, andthensro'ck' backthrough the spaces between the needles.

It will be evident that; unless the ;guide bars, when they come {to the end of;;each' stroke of; their reciprocating movement, registelff accurately with the needle spacing, Variation and interference:willLdevelopfbetween the needles and guide bars whenthe latter are rocked throughvthen ledle spaces. The means. employed to.- efi'e'ctpthe reciprocating movement of the guide bar consists of a cam wheel, generally known as afst-ud and; thus the accuracy of j the registration 0t the .guide.--bar with rfespect to the needles depends uponthe ac curacy of the high andlow surfacesoflthe cam-wheeh In time, these came wheels;be

come ,wornathereby causing the variation and interference above' descrijbed 'aIId there by e se; i d r yae ecting t 3 qua y f the goods beingmanufac'turedn Sinceeach cam wheelhas a numberofffstudsl or high points a similar numbergot lowpoints, it becomes necessary to put the-machine through itsentire ,cycleof operation, usually a number of times, before, the, mechanic can properly locate the worn or inaccurate spot and when located it is then" necessary to judgejhaphazardly by the eye of'the mechanic the amount of discrepancy exist ing "in the cam wheel.

mgdown 'or buildin-g up surfaces, by'screw adyustment or otherwise.

may have tor'be doneqover;

It will be appreciatedi that I this work is.

extremely te dious,f'uncertain and difiicult and requires an extraordinaryamount of care and skill on the part of-themechanic.

v-'lhereafter an approximate correction is 'made either by fil- If the adjust. ment; made isnot accurate the wholething Theflnain object of this invention iso to render inaccuracies in the, cam wheel more eas ly and certainly ascertainable and to determine more accurately the amount of discrepancy to be corrected, and the inven-;

tion consists 1 of" the apparatus hereinafter described, hereshown in a preferred form.

In the drawings:

Fig. l; isa'fragmentary view of so muchoLtheymachine; disclosed in Patent No. 397,l4 as is necessary to understand the invention, with the device of my invention shownfinrpositioni s L FigyQjis a sectional view on the plane Ofli11e2 20f Flg.-l-

I v Fig. ,Sis an enlarged face view of the dial, ;,pointer and rack used in connection with the invention'; j V

-v Figgf41isfasectional' View onthe plane of line 4.4;of1Tig. -,3 showing also the means for clamping the rackto the guide bar. Figjojis a,.sectional,view' on the plane of linen- 5 .ofrFig; 4, with-parts broken vaway and in section. I i I p 9 ind cates a: stud or cam 'Wheel'of which there may. be several, ;,one for bar, motion being imparted; to ina suitable manner, as fromn-shaft G by means of gears 9 and 9 The stud Wheel each guide is providedgwith a number'of'studs 9. a

few only being shown, 9 is apivotedlever', the lower end" of ,which-is actuated by the studs and the'upper' endfof which, is connecte'dby rod 9 with guide bar 9 which latter isi-mounted toFreciprocate. Each time the; lower end the guidebar is moved, to the left in Fig. 1

and; spring 1 8' causes return movement to theright ln Fig. -1 as far as the lowvsurs faces of the cam or. stud Wheel will permit.

of lever .9 encounters a stud,

said wheel a The guide bariscarried by arms 9 mounted on guide bar rock'shaft g and a rocking movementis imparted to said rockshaft and therefore to the guide bar by suitable means such as camsG and G acting on rollers g and g, the motion of which is transmittedthrough bellcrank 9. and link 9 to said rocksliaftr 1 indicates a dial and 2 is a pointer moving over it, therebeing apinion 3 ontlle, spindle of said pointer in mesh with gear 4'. These elements. arecarried by aibrackietx 5 having lugs 6 suitably attached to some stationary part of the machine,v such as: the;

longitudinal braces b. Bracket 5 also carries a guide 7 in which slides a rack 8 in mesh with gear 4' and heldcin engagement therewith by'means of spring-9; Rack 8 is actuated by-cthe stud or cam wheel,'that is, each time a stud encountersthe end of lever 9 and each time a stud allowslever 9 to drop back under the influence of springs, a movement in one direction or. the other is: imparted to rack 8. This movement may conveniently be effected by securing rack- 8' to guide bar 9 andithismay be done by: any suitable means such" as :clamp 9 and adjustable connection 10. g

In machinesusing twenty-eight needles-to the inch,- the distance between two needles i fromcenter to center is-.035714' and considering a group of twenty-two of such needles we find that the product of: .035714 times 22 is .785708. The circularpitch of a 36 diametral pitch gearor-pinion is .0873 and considering a pinion, having nine teeth we find that the product of 0873 times 9' is .7 857. Disregarding the infinitesimal decimal of .000008 we-therefore find'that acertain multiple of the centerdistancebetween two needlesandthe product of the circular pitch 7 times the numberof teeth of a certain pinion represent substantially -'the same distance measurement, viz. .7857} and that these elements:- therefore can be coordinated for measuring purposes;

It will now be understood thatdial'l is a graph onwhicli is plotted in circumferential relation a multiple, here twenty-two, of" the center distance betweentwo needles asul and that pinion '3 is of such circular pitch and has such number of teeth, here ninethat one revolution ofsaidpinion represents the: same measurement as the twenty-two needles. This is only byway of example as it will be understood that if the needle spacing were different a different gear andadif ferent-multipleof needles might have to'be used;

Fronithe foregoing, it follows-that upon movement of theguid'e bar in one direction, pinion 3 will turn a carrying pointerQ with it, a complete revolution ofthe pinion'being equalto agroup of twenty-twoneedles (Z Dial 1 is therefore provided with twentytwo divisions, and, in addition, with requisite subdivisions; and in this manner the particular part'of the cam wheel tliatis'de fective can be ascertained and-the amount-of the discrepancy can be'measured accurately by the subdivisions oft-he-dial.

If the studwheel is,-solid, the test of the apparatus is started by, finding the lug having the lowest height the indicator being set at zero, On astud wheel with individually adjustable lugs, the testing process may be started with any lug, the indicator being at zero, and any discrepancy shown by the other; lugs'corrected by raising or lowering said lugs an amount equal to the discrepancy.

This invention is applicable not only to warp knitting machines but to any machines inwhich twogroups of comb-like members pass between each other and in which inaccuracies in the actuating means for determining-tlie relative position of said groups may occur.-

' It: will be understood that theinvention is in the nature ofan attachment to the machine and'is removed when the machineis running.

I; claim:

1; A device for indicating inaccuracies in camiwheels thatefi'ect reciprocation of guide bars with respect to needles in knitting inachines comprising a pinion, the product of the circular pitch times thenumber of teeth of said pinionbeing substantially equal to a inultiple of the center distance between two needles and driving connections between the cam wheel, actuated by cam action thereof, andthe pinion.

2. A; device for indicating inaccuracies in cam wheels that effect reciprocationofguide bars-with respect to needles in knitting machines comprising: a pinion, the product of the circular pitch times the number of'teeth of said' pinion being substantially equal to a multiple of the center distance between two needles, driving connections between the cam wheel, actuated by cam action thereof, and the pinion, a dial having a number of divisions equal to said multiple of the center dist'ancebetween two needles, and a pointer associated with said dial and actuated by the pinion.

3; A device for indicating inaccuracies in cam wheelsthat effect reciprocation of guide bars with respect to needles in knitting machines comprising: a rack, connections between the rack and a guide bar, and a pinion drivenby the rack, the product of the circular pitch times the number of teeth oi the pinion being substantially equal to a multiple of the center distance between two needles.-

4. A device for indicating inaccuracies in cam wheels thatefl'ect reciprocation of'guide bars with respect to needles in knitting machines comprising: a rack, connections'between the rack and a guide bar, a pinion driven by the rack, the product of the circular pitch times thenumber of teeth of the pinion being substantially equal to a multiple of the center distance between two tions between the camnwheel, actuated by cam action thereof, and the pinion, the product of the circular pitch times the num ber of teeth of said pinion being substan-' tially equal to a multiple of thecenter distance between two needles, a dial having divisions indicating said multiple ofthe center distance betweentwo needles and a pointer actuated by said pinion and passing over said dial. v 6. A device for indlcating naocuracies 1n cam wheels that effect reciprocation of guide bars with respect to needles in knitting machines comprising: a rack, connections between the rack and a guide bar, a pinion driven by the rack, a dial, and apointer actuated by -said pinion and passing over said dial. a 7 V 7. A device for indicatinginaccuracies in actuating means that determine the relative position of two groups of comb-like members that pass between each other comprising: apinion, driving connections from said actuatlng means to said pinion, the product of the circularpitoh times the number of teeth of said pinion being substantially equal to a multiple of the center distance between two members of one of said groups.

8. A device for indicating inaccuracies in actuating means that determine the relative position of two groups of comb-like members that pass between each other comprismg: a p1n10n,dr v1ng connections from said v actuating means to said pinion, the product of the circular pitch times the number of teeth of said pinion being substantially equal to a multiple of the center distance between two members of one of said groups, a dial having a number of divisions equal to'said multiple of the center distance between two members, and a pointer associated with said dial and actuated by the pinion.

Signed at Amsterdam, in the county of Montgomery and State of New York, this 2d day of February, 1922.

FRANK J. KAUFMANN. 

